Arm backend: Build reference model without tests (#17588)

* Avoids a build error with some OS & clang configurations


Change-Id: I16c3e9e9908c824d282b20791f14373a8d959b22


cc @digantdesai @SS-JIA @freddan80 @per @zingo @oscarandersson8218
@mansnils @Sebastian-Larsson @robell

---------

Signed-off-by: Tom Allsop <tom.allsop@arm.com>

Author: tom-arm

examples/arm/setup.sh

@@ -349,6 +349,7 @@ if [[ $is_script_sourced -eq 0 ]]; then
 
     CMAKE_POLICY_VERSION_MINIMUM=3.5 \
         BUILD_PYBIND=1 \
+        BUILD_TOSA_REFERENCE_MODEL_TESTS=0 \
         pip install --no-dependencies ./reference_model
 
     CMAKE_POLICY_VERSION_MINIMUM=3.5 \